Real Estate and Other Activities - Watsonville Community Hospital - Additional Information (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2021
Business Acquisition [Line Items]
Loans repaid	[1]		$ 22,900	$ 1,103,410
Watsonville, California [Member]
Business Acquisition [Line Items]
Provision (recovery) for credit loss		$ 15,000

[1] The 2023 column includes a $23 million mortgage loan that was converted to fee simple ownership of one property as described under the Lifepoint Transaction below. The 2021 column includes an £800 million mortgage loan advanced to the Priory Group (“Priory”) in the first quarter of 2021 and converted to fee simple ownership of 35 properties in the second quarter of 2021 as described below.